diff --git a/.github/workflows/ci-nix.yml b/.github/workflows/ci-nix.yml
index 8fc7ac985..1171fde77 100644
--- a/.github/workflows/ci-nix.yml
+++ b/.github/workflows/ci-nix.yml
@@ -41,7 +41,7 @@ jobs:
 
       - name: 'Run Nix build for {{ matrix.nixpkg }}'
         shell: bash
-        run: nix build -L '.?submodules=1#${{ matrix.nixpkg }}'
+        run: nix build -L '.#${{ matrix.nixpkg }}'
 
       - name: 'Show result contents'
         shell: bash
diff --git a/scripts/generate_nix_submodules.sh b/scripts/generate_nix_submodules.sh
deleted file mode 100755
index 51073294c..000000000
--- a/scripts/generate_nix_submodules.sh
+++ /dev/null
@@ -1,82 +0,0 @@
-#!/usr/bin/env bash
-
-# Generates nix/submodules.json from .gitmodules and git ls-tree.
-# This allows Nix to fetch all git submodules without requiring
-# locally initialized submodules or the '?submodules=1' URI flag.
-#
-# Usage: ./scripts/generate_nix_submodules.sh
-#
-# Run this script after:
-#   - Adding/removing submodules
-#   - Updating submodule commits (e.g. after 'make update')
-#   - Any change to .gitmodules
-#
-# Compatible with macOS bash 3.x (no associative arrays).
-
-set -euo pipefail
-
-REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
-OUTPUT="${REPO_ROOT}/nix/submodules.json"
-
-cd "$REPO_ROOT"
-
-TMP_URLS=$(mktemp)
-TMP_REVS=$(mktemp)
-trap 'rm -f "$TMP_URLS" "$TMP_REVS"' EXIT
-
-# Parse .gitmodules: extract (path, url) pairs
-current_path=""
-while IFS= read -r line; do
-  case "$line" in
-    *"path = "*)
-      current_path="${line#*path = }"
-      ;;
-    *"url = "*)
-      if [ -n "$current_path" ]; then
-        url="${line#*url = }"
-        url="${url%/}"
-        printf '%s\t%s\n' "$current_path" "$url" >> "$TMP_URLS"
-        current_path=""
-      fi
-      ;;
-  esac
-done < .gitmodules
-
-# Get pinned commit hashes from git tree
-git ls-tree HEAD vendor/ | while IFS= read -r tree_line; do
-  mode=$(echo "$tree_line" | awk '{print $1}')
-  type=$(echo "$tree_line" | awk '{print $2}')
-  hash=$(echo "$tree_line" | awk '{print $3}')
-  path=$(echo "$tree_line" | awk '{print $4}')
-  if [ "$type" = "commit" ]; then
-    path="${path%/}"
-    printf '%s\t%s\n' "$path" "$hash" >> "$TMP_REVS"
-  fi
-done
-
-# Generate JSON by joining urls and revs on path
-printf '[\n' > "$OUTPUT"
-first=true
-
-sort "$TMP_URLS" | while IFS="$(printf '\t')" read -r path url; do
-  rev=$(grep "^${path}	" "$TMP_REVS" | cut -f2 || true)
-
-  if [ -z "$rev" ]; then
-    echo "WARNING: No commit hash found for submodule '$path', skipping" >&2
-    continue
-  fi
-
-  if [ "$first" = true ]; then
-    first=false
-  else
-    printf '  ,\n' >> "$OUTPUT"
-  fi
-
-  printf '  {\n    "path": "%s",\n    "url": "%s",\n    "rev": "%s"\n  }\n' \
-    "$path" "$url" "$rev" >> "$OUTPUT"
-done
-
-printf ']\n' >> "$OUTPUT"
-
-count=$(grep -c '"path"' "$OUTPUT" || echo 0)
-echo "Generated $OUTPUT with $count submodule entries"